The study examines satisfaction among vehicle owners who visit a service department for maintenance or repair work. The CSI rankings are based on dealer performance during the first three years of ownership, which typically represents the majority of the vehicle warranty period. Five measures are examined to determine overall customer satisfaction with dealer service (listed in order of importance): service quality; service initiation; service advisor; service facility; and vehicle pick-up.Lexus ranks highest in customer satisfaction with dealer service among luxury brands and receives an award for a second consecutive year. Lexus achieves an overall CSI score of 837 on a 1,000-point scale and performs particularly well in four of the five measures: service quality; service initiation; service advisor; and service facility. Rounding out the top five nameplates in the premium segment are Cadillac (827), Jaguar (822), Acura (817) and BMW (816). Among luxury brands, Cadillac and Mercedes-Benz post the greatest improvements from 2009.Among mass market brands, HUMMER ranks highest with a score of 815 and performs particularly well in the service quality and service facility factors. Also among the top five brands in the mass market segment are Saturn (808), Buick (805), Chevrolet (787) and MINI (786). Six General Motors brands (including brands GM is divesting) rank within the top seven in the mass market segment. Among mass market brands, Kia and Volkswagen post the greatest improvements from 2009.The study finds that overall satisfaction with dealer service has increased from 761 in 2009 to 767 in 2010, marking the 10th consecutive year of industry-wide improvement.Notable improvements are demonstrated in the service facility and service quality measures in 2010, compared with 2009. In particular, satisfaction has increased in the following areas: ease of driving in and out of dealer facilities; convenience of parking; thoroughness of the work performed; the total time required to complete service on the vehicle; flexibility of accommodating the customer schedules; and thoroughness of explanations.Several other time-related metrics have improved from 2009, including customer ability to get a service appointment on the same day as their initial inquiry call and service being completed the day that the vehicle was brought in for service."These improvements may be due to not only an increased focus on customer satisfaction from dealers, but also are possibly a result of lower volumes of service traffic that dealers are now experiencing," said Osborn.The 2010 CSI Study is based on responses from more than 114,200 owners and lessees of 2005 to 2009 model-year vehicles. The study was fielded between October and December 2009. J.D. Power and Associates measures dealer service in various countries around the world, including Australia, Canada, China, France, Germany, India, Indonesia, Japan, Malaysia, Mexico, New Zealand, the Philippines, South Africa, Taiwan, Thailand and the UK.